RUEF500K-AP

Ptc Resettable Fuses Overview

The Littelfuse RUEF500K-AP is a PolySwitch resettable PTC fuse from the RUEF series, rated for 30 VDC with a 5 A hold current and 10 A trip current. It features a maximum fault current rating of 100 A and a typical trip time of 14.5 seconds. The device has a maximum resistance of 50 mΩ and operates within a temperature range of -40°C to +85°C. Dimensions are 24.1 mm in length, 14 mm in width, and 3 mm in height, with a power dissipation of 3 W.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit protection through polymer positive temperature coefficient technology
• Offers repeatable overcurrent protection without requiring manual replacement
• Designed for radial through-hole mounting on printed circuit boards

Ptc Resettable Fuses Applications

• Secondary circuit protection in automotive electronics
• Overcurrent protection for portable electronic devices
• Circuit safeguarding in industrial control systems

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix AP indicates reel or cut tape packaging configuration when ordering. Confirm that the 30VDC voltage rating and 5A hold current align with the target circuit design requirements. Ensure compatibility with the specified operating temperature range of -40°C to +85°C for the intended application environment.

Ptc Resettable Fuses Selection Notes

Select this component for applications requiring high holding current capabilities up to 5 Amperes in a compact form factor. Consider the 100 Ampere maximum fault current rating for robust short-circuit protection. Evaluate the radial lead spacing and physical dimensions to ensure adequate clearance on the printed circuit board layout.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RUEF series of resettable fuses, which are engineered for high-current applications. The series utilizes polymer PTC technology to provide reliable circuit protection. The RUEF family is widely recognized for its ability to handle significant fault currents while maintaining a low profile suitable for dense PCB layouts.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include RUEF500K and RUEF500-2, which share identical electrical ratings and physical dimensions. Verify package availability differences, as these variants may come in bulk, cut tape, or reel formats.